I've got a mate who just came back from the USA having got the full JAR PPL in about 5 weeks. His actual flying is very good, but when i asked him about his RT he hadnt a clue, as the little GA field he was at accepted anything said over the radio, even if it wasn't good RT. The airspace practise in the South East UK I got flying from Cranfield doing my PPL was definately worth the extra bit of money, as I am confident flying through controlled airspace round EGGW and EGSS, whereas my friend who paid only a few hundred less to fly in the states wouldn't even consider trying to get a zone transit through some Class D. It's your choice, but Cranfield worked for me, £5000 for a JAR PPL, for everything.